Work support



W. J. BAUMBERGER WORK SUPPORT Filed April 6. 1925 3 Sheets-Sheet 1 m 5? I HI at w I MNT .U 1M4 a M 1 ,A I |H II I I 1 I I h\ I I 0 I I I a 8 MI IN I E I, I) N h N A T? a i n N I I I II M1! I I I IIIIIIII IIIII I I I QM M mm mm.

M 2 0 O a 6 w N. l n e h s 3 R E 5 F G R Z 3 R T l 4 H m 6. Q 3 n M w 1 H n. 6 m m A a 3 .vn m m s r J W .n 9 In 4 March 6, 1928.

z 0 I M c v M ad WORK SUPPORT Filed April 1925 3 Sheets-Sheet 3 ZJJZZ/EM Patented Mar. 6, 1928.

UNITED STATES PATENT OFFICE.

WILLIAM J. BAUMBERGER, or navnnronnlrown, ASSIGNOR TO MICRO MACHIN COMPANY, or nnrrnnnonr, IOWA, A oonro mrron or IOWA.

WORK SUPPORT.

This invention relates to improvementsin work holders for grinding machines and the like. i

In positioning work upon a machine, preparatory to grinding cylinder walls and the like, it is customary to provide alixture which is associated-with the machlne so that the work can be positioned in desired relation with the grinder. Generally such fixtures include a frame which can be bodily adjusted transversely and longitudinally relative" to the grinder, and a pair ofparalle'l jaw members, which are supported by the frame, between which the workis held. It is desirable,- with this type of fixture, that the jaws can be adjusted in a vertical plane so as to accommodate various sizes of work, as well as to presentthe workin different elevations to the grinding wheel. Due to the weight of the work, and to the manner in which the jaw members are now mounted, the jaw members often get out of parallel relation and also tilt even when parallel,

both of which conditions are deleterious to good grinding.

An object of my invention isto provlde a work holder having vertically ad ustable jaw'members which are mounted so that they will remain continuously'in parallel relationand in the same horizontal relation in any position of adjustment. p

A further object of my invention resides in providing a work holder having jaw members which can be adjusted separately, or together, in a vertical plane, and wlnch will remain in parallel relation and inthe samehorizontal relation. l

Still another object of my invention resides in the provision. of mechanism which can be operated to adjust jaw members of a Work holder, either separately or together,

in a vertical plane.

These and other objects and the invention itself will appear in the following specification.

In the accompanying drawings, 7

Fig. 1 is a front elevation of a work hold er embodying my invention, fragmentary parts being shown in section.

Fig. 2 is an end elevationof the same.

Fig. 3 is a section taken on line 3=3 of Fig. 4 showing mechanism. foradjusting the jaws.

Fig. dis a plan view of the work holder. Fig. 5 *is an end elevation, partially in section, of'the lower jaw member showing the shaft for adjustingthe same.

Fig. 6 is a section taken on line 66 of Fig. 5.

Referring now tothe drawings by char acters ofreference, 10] represents a fragmentary portion of themachine table which is Such table is provided with a dove-tail recess in its bottomso that it can be adjustably s'e reciprocable relative to the grinder.

cured: to the movable portion of the machine bed. The fixture is secured to the table and is arranged to hold work in the path of the grinder and in desired relation therewith.

. A platform 11 is mounted upon the'table and is secured thereto by boltslQ and 13 in aconventional manner. The upper-face of the platform isprovided with a transversely extending dovetail recess '14-,s0 that the work holder portion'of theffixture can be slidably associated therewith. 1 v I A base frame 15 is seated upon upstanding ribs16 of the platform-11, and is provided with a depending dove tail tongue 17 which extends into the. recess; 14 and is secured against the side walls thereof by a gib 18. A screw shaft 19 extends trans.-

versely relative to the machine .table and is rotatably carried in bearings depending from {the base frame. Theshaft extends through a threaded bearing '20 secured to vthe platform, and a handleQl isprovided at one end of the shaft so that ,it can be manually rotated to move the base frame bodily transversely upon the platform and across the path of the grinder. y

. The base frame is formed with a pair of upstanding parallel standards .22 which carry the work to be operated upon by the grinder. Tlie standardsare provided with vertically extending flanges which have parallel bearing faces 23 across which a pair of jaw: members 24 and 25 extend and are mounted so that they -bearv thereagainst. Vertically extending retaining bars .26321'18 secured in spaced relation-adjacent the faces '23 of the standardsby bolts'27. The heads space intermediate the bars and the faces 23 provides vertically extending guideways to prevent lateral displacement of the jaw members, and topermit them to be moved in a vertical plane.

v A shaft .is rotatably carried by aperturcd bearing ortions at eachend of the lower jaw mem or 25, and a gear 31 is keyed to the-ends of the shaft adjacent each end of the jaw member/1011c of the .gears 1s provided with an irregularly shaped'stub shaft 32 upon which a hand crank can be applied to rotate the shaft and the gears. I Racks 33 are secured to each side .of the vertical flanges of the standards 22, and the teeth are arranged sothat they will be engaged by the gears 3 l. By rotating the shaft 30 the lower jaw member will be. moved bodily in a vertical plane. because of the engagementof the gears with the racks, and therefore the horizonal position of the lower jaw member will remain; similar in any position of vertical adjustment.

l A hearing housing or bracket 34 is secured by bolts 35 upon the top of each standard and projects beyond the faces 23 above the-upper jaw member 24. Each bracket is provided with a removable cap section36, and a vertically extending bushing 37 is retatably carried by'each bracket. The bushings are threaded toengage the screw shafts 38 which extend therethrough, and are secured at' their lower ends to. the jaw memher 21 by any-suitable means such as a pin 38,indicated in Fig. 3. Aegear 39 is keyed to reach of the bushings: 37 andmesheswith worm gears 40 Within the bracket housings, which gears 40 are secured to a shaft 41cmriedin hearings in the housings: One end of such shaft projects'beyond a housing and is formed to receive a crank by means of which it can be manually rotated.

The upper jaw memberis thus suspended adjacent-eaclrerid from the screw shafts 38. By rotating the shaft 41, the gears 40 will rotate the gears'39 and thebushings to which theyare keyed,-and thereby move the screw shafts-and the upper ja w member bodily in azvertical plane." The gearing is arranged so that the screw shaftsjoperate alike, and thus'the upper memberis always main- 'tainedin the same horizontal relation in any position rof vertical adjustment. The jaw members are arranged in parallel relation,

and they will remainin such relation, due to their mounting, in any position. of verticaladjustment; "ltwill be seenthat either jaw member can be adjusted independently .bythe manual operation ofthe mechanism associated therewith for such purposes.

A releasable connection is provided between the jaw members toisecure them together invarious desired spaced relations to accommodatedifi'erent sizes of work. I Links are secured, by studs 51.at one end, to the ends ofithe lowerjaw member,and they proj cot-upwardly substantially the length of the standards'adjacent the ends of the upper jaw members: The links are provided with vertically extending slots52, and studs 53 can be a justed vertically independently.

When the'links are clamped to the upper jaw member by the studs 53, the jaw members can be moved as an integral structure 1na vertical plane when the mechanism for adjusting the upper jaw member is operaled. When the jaw members are secured in spaced relation by theilinks, the mounting of the screw rods 38 make it impossible to operate the mechanism for adjusting the lower jaw member.

\Vith the above described adjustments, various sizes of work can be held between the jaw members by. making the independent vertical adjustments, andwhen the work is secured between the jaw: members, unitary vertical adjustments can be made to place the work inthe desired plane for the proper operation of the grinding wheel.

It will beseen that withthe construction described, it is impossible forthe jaws to get out ofparallel relationor to vary in their horizontal relation in any vertical position of adjustment, either separately or in unison.

'Itwill be further seenthat with the construction described the jaw members 'an be from the spirit of myinvention and the scope of whatI claim. 7

What I claimis:

1. A fixture for supporting work in the path of a tool comprising a frame having upstanding standards, a pair ofparallel jaw members carried by said standards, said jaw members being adjustable relatively and to,- gether in a vertical Jlane,independent mechanism for bodilyadjus'ting each of said jaw members, said members remaining continuously in a: horizontal plane, and releasable means fol-securing said jaw members together in adjustedrelation. a A fixture for supporting workin the path of a tool comprising a frame, a pair of parallel jawmembers carried bysaid frame and adjustable independently. in a vertical plane, a rotatable shaft carried by the lower and releasable meansfor-connecting said jaw members in spaced verticalrelation, the j rotation of said shaft when said connecting .means is. released causing: Said lower jaw member tomove bodily in a vertical plane.

3. A fixture for supporting work in the path of a tool comprising a frame, a pairof vertically adjustable aw members, brackets secured to said frame, adjustable means carried by said brackets for suspending said upper jaw member, a means releasably connecting said jaw members, means for preventing lateral displacement of said jaw members from said frame, and means for maintaining said jaw members continuously in parallel relation.

4. A fixture for supporting work in the path of a tool comprising a frame, a pair of vertically adjustable jaw members, brackets secured to said frame having threaded bearings therein, threaded shafts extending through said bearings in said brackets, said shafts being secured to the upper of said jaw members, manually operable means for rotating said shaft to bodily vary the vertical position of said upper jaw member, releasable means connecting said jaw members, and means for preventing lateral displacement of said jaw members from said frame, and means for continuously maintaining said jaw members in parallel relation.

5. A fixture for supporting work in the path of a tool comprising a frame, a pair of parallel jaw members slidably mounted with said frame, said jaw members being adjustable vertically independently and in unison, links secured to one of said jaw members, and releasable means for securing said links to the other of said jaw members in any relative parallel spaced relation of said jaw members, separate mechanisms for moving each of said jaw members independently in aevertical plane when said links are released, one of said mechanisms moving both of said jaw members in a vertical plane in unison and the other mechanism being inoperative when said jaw members are secured together by said links.

In testimony whereof I affix my signature.

WILLIAM J. BAUMBERGER. 

